"™mai, jm>"1!T.7u.'] «s aiypUecl to Fhoto-micrografhy. 



297 



The process employed by me in the production of negatives 

 with the Magnesium light is essentially the same as I have above de- 

 scribed for the Electric light, simply the Magnesium lamp is substi- 



tuted for the Electric, and the condenser of an ordinary oxy-calcium 

 magic lantern is made to concentrate the hght on the achromatic con- 

 denser of the microscope. The above cut represents the arrangement. 



